Heater



Nov. 20, 1928. 1,692,164

I H. E. FROMM HEATER Filed Dec. 20, 1926 12%" Alf-75 I I *1. 1 9 Q 34 A IN VENTOR J Y IMHRYEFHONH.

)X"? ATTORNEY gnu mu Patented Nov. 20, 1928.

UNITED STA HARRY E. FROMHL- OIv DETROIT, MICHIGAN.

HEATER.

Application filed December 20, 1926. Serial No. 156,049.

Thisinvention relates toheaters and more particularly to a heater adapted for use on internal combustion engines, such as a heater used formaintaininga predetermined temperature when the motor is not in operation.

It is desirable in cold. weather to provide some means for heating up the motor to facilitate starting or to maintain a constant temperature to prevent freezing. It is also desirable to provide a heater which is readily adaptable to the water jacket.

he primary object of my invention is to provide a simple and inexpensive device forming a part of the motor which may be readily adapted to a source of electrical current, such as the ordinary house lighting current.

Another object of the invention is to position the heater within the water jacket illustrated by securing the heater to a detachable portion of the jacket.

Other objects and advantages will more fully appear from the following description taken in connection with the accompanying drawings, in which ig. 1 is a side elevation of an internal come bustion engine and its cooling system showing an embodiment of the invention. Fig. 2 is a view of a side elevation of a heater unit, parts being broken away.

Fig. 3 is ber'of the heater.

Fig. 4 is a sectional Fig. 2.

Fig. 5 is a sectional View throu h one of the terminals taken on line 5-5 of Fig. 4.

Referring to the illustrated embodiment of my invention, an internal combustion engine 10 has been shown with a water cooling system which consists of a radiator 12, having an upper connection 14 for the flow of water from the motor to the radiator and a lower connection 16 for the flow of water from the radiator to the motor. A water jacket 18' around the cylinder walls 20 has" been shown which is of the usual design.

In the particular form illustrated, a pair a View showing the heating memview on line 44 of of plates 22 constitute a portionofthe water jacket wall. For the purpose of conveniently positioning the heater within the jacket it is secured to one of these lates. Referring particularly to Figs. 2 an heater comprises ashell 24 having a oss- 26 adapted to project throu h the plate 22. The boss 26 is screw threaded to receive a nut 28 which securely holds the shell 24 on the inner surface of the plate 22..

4, the housingjof th The heating member comprises an insulat ing member 30, preferably mica, to which is secured a pair of electrical terminals 32 to which is secured the opposite ends of a resistance wire 34 wound around the insulating member 30. An insulating member 36 is adapted to fit within the shell 24 and is provided with openings 38 through which extend the terminals 32, the terminals also extending through the boss 26 forming in effect a plug to which may be attached the usual socket. Insulating collars 40 space the heating member from the shell 24 and the boss 26 and an insulating member 42 is positioned between a flange 44 on the terminal and the boss 26. A nut 46 screw threaded on the inner, end of the terminal 32 draws the terminal inwardly securing it in position. A nut 48 secures the insulating member 30 against the nut 46 and also serves to securethe end of the resistance wire 34. Thus the nuts not only binding posts but serve to hold the assembled relation.

Insulating members 50 are placed over the heating member and secured in position by a cap or cover 52 which fits over the shell 24 and is soldered or otherwise secured thereto. The cover and shell form a water tight housing for the heating element and the housing is submerged in the cooling medium.

serve as parts in It will be understood that the entire as-.

sembly is secured to the plate 22 and may be readily adapted to an engine within the wa- .ter jacket. The terminals 32 projecting outwardly from the engine are readily accessible for securing thereto the ordinary electric light socket 54 or the terminals of any electric system of sufiicient voltage. I

In the practical operation of my device it is only necessary to apply the socket 54 to the terminals 32 and the cooling medium for the motor is heated. It is particularly desirable in cold weather before starting.

It will be obvious that various changes may be made in the arrangement, combination and construction of the various parts of my improved device without departing from the spirit of my invention and it is my intention to cover by my claims such changes as may be reasonably included within the scope thereof. 7

What I claim is v 1. In the combination of an internal combustion engine having a water jacket, 8. de-

tachable plate forming a, portion of the outer wall of said water jacket, an electrical heating element secured to the inner side of said plate, and an electrical connection pro ecting through the wall of said plate adapted to receive electrical terminals.

2. In a heater of the class. described comprising, an outer shell having a boss adapted to be secured to a support, a heating element secured between insulating members within said shell, electrical terminals secured to said heating element and projecting through said boss, and a cover adapted to be secured to said shell to secure said heating element and its associated parts in assembled relation.

3. In the combination of an internal combustion. engine having a water jacket, a detachable plate forming a portion of the outer wall of said jacket and provided with an opening, a fiat casing at the inner side of said plate larger than the opening in said plate, a boss on said casing adapted to fit the opening in said plate and extending through said opening, means for securing said boss within said v opening and terminals extending through said boss.

4. In a heater for internal combustion engines comprising a flat rectangular casing,

a support for said casing forming a portion of the water jacket of said engine, a heating element in said casing, an annular boss projecting from said casing adapted to extend through said support, means at the opposite side of said support for securing said boss in position, and detachable means extending through said boss for heating said element.

HARRY E. FROMM. 

